<!DOCTYPE html>
<html>
	<head>
		<meta charset="utf-8">
		<title></title>
		<style type="text/css">
			/*0 0 0 1 + 0 0 0 1 = 0 0 0 2*/
			ul li {
				color: orange;
			}
			
			/* 0 0 0 1*/
			li {
				color: red !important;
			}
			/* 0 0 1 0 + 0 0 0 1 = 0 0 1 1*/
			.nav li {
				color: green;
			}
			
		</style>
	</head>
	<body>
		<ul class="nav">
			<li>张三</li>
			<li>李四</li>
			<li>王五</li>
		</ul>
	</body>
</html>
